Clock striking mechanism.



EMENTED MARQzz, 1904.

R. TUERGK.

'CLOCK STRIKING MEGHAH BM, f

APPLICATIOH FILED BOV. 23, ISST..

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Jv Holm..

PATENTBD MAR. 22,1904@ R. TUSRGK. CLOCK STRIKING MBCHANISM.

APPLIOATIOI YILBD 30"?. 28, 1902.

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p( may; annif; WLM. wAw-havm'u UNITED? STATES -:Patenten Maren 22, i904.

ROBERT irUERcK, or zt'iiiieinswirznnniirn, AssiGNoR- To EUGEN I e Gunnor ZURICH, swi'rZERLAND.

SPECIFICATION forming part of Lette-is Patent No. 755,260, dated March22, 1904. i

Application fi November 28, E02. Serial No. 133,171. (No model.)

To all whoml it may concern.:

Be it known that I, ROBERT Trianon, a subject of the Emperorof Germany,and a resident of Zurich, Switzerland, have invented certain new anduseful Improvements in Striking-Clocks, of whichthe following is aspeci- ,i

ication.

My invention has relation to striking mech anisiiis for clocks organizedto strike thehouis io and half-hours. i

Geneiically the invention consists in the comi bination, with a strikingmechanism, means to lock the same against operatiomand a let-orf l 1,\iJ L mec ianism compi isiiig a et oiiiever, oi means to control themovements of s idlever, consisting ofv a step-disk in the foi mmf astarwheel having twelve lteeth and pr i'v'ded with a stop serving toarrest the nioveinentsof the let-oif lever after the hour has heen"struck, said stop constituting the starting-pointfiiem which thestai-or step wheel, hereinafter called the step-wheel, is moved to whichit is returned through the instrumentality of the let-ofi` lever duringthe striking of the hour.

The step-wheel has motion with the niinutehand and also `with thehour-hand` the movement of the step-wheel to its starting-peint being ina reverse direction.

The invention further consists in the provision of means for actuatingtee let-olf lever and releasing the striking mechanism at each half-hourin such manner as to prevent said lever from imparting a backwardmovement to the step-wheel.

The invention further consists in details of construction andcombinations of cooperating parts, as will now be fully described,refer- Q ence being had tothe accompanying drawings,

in which- Figure 1 is a sectional rear elevation of so 1 much of aclock-striking mechanism as will e l of my in he necessary to anunderstand vention, the elements thereof l ng shown in their relativepositions after t e striking or' 5 the half-hour Fig. 2 is a sim. arview showing the elements in their relative positions just beforestriking the hour. r 3 is aplaii view of Fig. 2- P ig. 4. is a detanlview. Fig.

` 5 is a sectional fragmentary front elevation showin'gthe elements intheir relative positiens when striking the hour. Fig. 6 is aseotionalfront elevation showing the elements 1 in their relative positions'after striking the hour. and Fig. 'a' is an end elevation of Fig. 6. Inthe drawings, p and p' indicate the-front i and rear frame-plates forthe striking and time trains, only so niucli of either being shown aswiil be necessary to an understanding of i my invention.

i 1 ind ieates thehammer-actuating pin-wheel, having pins 2, adapted toengagea radial arm 1 on the hammer-shaft?) and rock the latter in awell-kiiown manner, and to'said shaft 3 is secured the rod which carriesthe hammer 5. The pin-wheel l is geared to an arbor 6, g which latter isdriven to make one complete revolution vfor each stroke of the hammer,and to said aroor 6 are secured a sectoral cam 27 and l a radial arm 7,having a pin 8 at its free end adapted to be engaged by a pallet 10 onade- E tent-arm 9, secured to one end of a shaft 12, to the opposite endof which is secured a let-olf ever 13, the downward movement or drop ofwhich is limited by a stud 13 on the front l frame-plate p, said shaft12 being` secured in j hearings formed in radial ariiis 11 on thehainnier-sha-ft 3, so that when said shaft is rocked the detent"9 andlever 13 aie reciprocated, while said detent and lever have also arocking motion with the hammer-shaft. At its free end the lever 13 has alaterally-projectiiig pin 14, on which is loosely mounted a weighteddisk i 15, having a radial arm carrying a laterallyprojecting pin 16 anda pallet 15', and said disk has two pins 18 and 18', one above. and theother below the let-o lever 13, the pin 1S' serving to limit thedownward swing of the disk l5 under its weight, while pin 18 serves tolock said disk to the letot lever and to he described, the relativelocation ,of said ment on its pin 14: when rotated positively in onedirection or hy gravity in an opposite direction.

On the minute-hand arbore issecureda letcanse the two to move in anupward i'lirection` under the action of the. let-oli' cani presentlypins 18 and 1S' being such that the disk will have a certain amount ot'idle angular move gio `is frictionally.mounted, so as uo rotatetherewith, a step-wheel 21 having twelve teeth, the

gap between two of which is bridged' over by a bridge The step-wheelZlhas a laterally-projecting pin 23 in the path offa like pin 25 on thehour-wheel 21, whereby the rotation of the step-wheel with theminute-hand arbor is arrested and said stcp-wheel caused to movesynchronously with the hour-wheel whenever the pin 23 overtakes the pinQ5.

The operation of the described striking mechanism is as follows: At thestroke of the houror at the last stroke of the hour the pin .14: onlet-off lever 13 is caught by the bridge 2:?. on step-wheel 21, the cam17 and weighted disk l5 then occupying the relative posivtions shown inFig. 5, while the relative position of or the distance between the pinQ5 on hour-wheel and thepin 2301i step-wheel 21 will depend upon thehour to ive struck. Inasmuch as the let-olf lever 13 and detent 9 arerigidly connected to the hammer-shaft 3 and inasmuch as the hammershattis locked against rotation by detent-pallet 10 and pin 8 of radial arm?on arbor 6, the dctent-lever is held against motion or in a normalposition. Starting from the position shown in Fig. 6, as the minute-handarbor a is about to coml plete one-halt` of a revolution the nose l0 ofletoff cam 17 impinges on pin 16 of weighted disk 15, turning the sameidly in a direction opposite to the direction of rotation of the saidarbor a until pin 18 on said diskcontacts with let-olf level' 13, thuslocking the two together and causing the said lever, and with it thedetent 9, to be lifted -by the cam-nose 20 sulliciently to'move thedetent-pallet 10 out of engagement with pin 8, aliowing arbor 6 torotate, whereby the sectoral 4cam 27, acting on said detent 9, lifts thesame. and with it the let-ottl lever 13, still higher. The sectoralarm'l then moves out of contact with detcnt 9, allowing the same and thelet'ot lever 13 to drop, and thereby rocking the hammer-shaft 3, causingthe hammer to strike the. `sounding device, whereby pallet 10 is broughtinto the path of pin 8 and locks the striking mechanism. Asl

soon as cam-nose 20 clears pin 16 on disk 15 to allow let-off lever 13to drop said .disk Swings back to a normal position and its pin iscaught by the part' 26 of greater diameter of the let-off cam, thuslimit-ing the drop of 'I detent 9 and preventing disengagement of pallet10 from its pin. Before the `minute-hand arbor completes its revolutionthe pin on step-wheel 21 will overtake the pin 25 on hour- Wheel 21,causing said step-wheel to move with said hour-Wheel until the latterhas made one-twelfth of a revolution, at which time the minute-handarbor a and let-oit cam 1T will have made a complete revolution, therebysc\`1 9 of cam 1T in Contact bringing cam-no with pin 16 on disk 15,whereby said `disk is turned, as before, `vin a direction opposite tothe hands of the chick to lock the disk to the let-oil' lever, andthereby lift the same, and therewith thedetcnt 9, to release thestriking mechanism. As the lett-off 'lever is lifted and allowed to dropat eaclievolution of the sectoral `cam 27 on arbor 6, the pin 11 on saidletotf lever acting on the teeth of the step-wheel 21 moves the vsaineback la distance of one tooth for each stroke of thel hammer until atthe last stroke the bridge 22, then lying under pin 11 on let-ott'lever, will` so limit the downward movement of 'said lever as to bringthe detent-pallet 10 in the pat-h of pin 8, and thus lock the strikingmechanism. ln the striking of the hour as soonI as cani-nose 19 movesout of contact with pin 16 on disk 15 the latter swings down behind saidcam-nose, and the lever 13 now drops onto the part 28 of least diameterot' the cam 17, or, idother words, the lever 13 moves down to a greaterextent than duringthe striking of the halfhour, and as the detent-arm9partakes of t iis movement it will lie below1 pin S on arm 7 when in itslowcrmost-position, and to admit of the passage of said pin the arm 9is. provided with the recess 9', as shown in Fig. 3. On the other hand,as has been stated, the letoii' lever 13 and detent-arm 9 are soconnected with the hammer-shaft as not only to partake of its rockingmotion, but also to receive areciprocating motion, the recess 9' beingso located as to lie in the path of pin 8 on arm 7, secured to arbor (iat the proper moment, while the reciprocations of lever 13 are necessaryto the proper step-by-step backward rotation of step-wheel 21. In Fig. 2the sectoral cam 27 is shown as about to move o'ut of engagement withdetent-arm 9, the latter being at the limit o' its upward movement aswell as at the limit of its rectilinear or substantially rectilinearmovement to the right. As the detent is released by the cam 27 saiddetent-arm, the hammer, and the let-cti lever drop, while the latterlever and the detent-arm at the same time move toward the left,'so thatsubstantially a complete revolution, and inasmuch as the hour-wheelmakes one-twelfth Ot' a revolution for eachl complete revolution ofObviously the period IIO the minute-hand arbor and in View of the factthat the contact between the two pins takes place and the step-wheel i1is thereby caused to move with the hour-wheel 21am additional n un,...

V17' on pallet 15 at a time'when pin 16 lies in 'ver carried by the haminer-sb aft,means for is given aretrograde motion, tooth by toe angularmovement equal to one-twelfth of f to itatA each succeeding hour fromone to twelve. In Fig. 5 the clock is striking tive, the wheel Q1 beingturned back a distance of L live teeth, when the bridge 2) will stop thestriking. During the neitt hour and before the step-wheel 21 has movedwith the miav hand arbor a distance but slightly greater x a revolutionof said step-wheel is imparted l ite- 1an that between tive teeth itsmovement will be I arrested by the hour-wheel and said step-wheel I willthen move with said hour-wheel, and as the latter will have madeone-twelfth o a l revolution when the minute-hand arbor erfanpletes itsrevolution the step-wheel will have been advanced one step morej.e.,'there will besix teeth between the bridge and the pin 14C on let-offlever 13, and so on for each hour.

I have described the weighted disk 15 as being provided with a pallet1.3' and the let-otf at the point of junction ot the cam-nose 2G withthe portion 26 of greatest diameter of said cam. From the description ofthe operation of the striking mechanism it willv readily be seen thatthe pin and pallet referred to do not atl'ect the said operation in anymanner and may therefore bedispensed with. It is obvious, however, thatthe action of thepin the angle formed'by the cani-noseV 20 and theconve): part 26 of cam 1T will facilitate the passage of pin 16 ontosaid convex portion in that the pin 17' will then support the weight ofdisk 15.

Having thus described my invention,wliat I claim as new therein, anddesire to secu-e by Letters Patent, is-

1. 'In a clock having hour and half-heur striking mechanism, thecombination of a minute-arbor, a twelve-tooth ratchet or step-wh`controlling the hour-striking work, loo y mounted on said arbor so as tonormally rotate with it through friction and having the gap between twoteeth bridged over, and provided with a lateral stop, an hour-wheelhaving a stop which engages said stop ot the ratchet-wheel' and carriesthe latter with i a hammer-striking mechanism. a releasingr parting areciprocating motion to said lever, means for imparting an up-and-downmoon to the same, and a. pin projecting from s releasing-lever end andengaging with teeth of said ratchet-wheel", whereby the la until the pinrests upon the said bridge z so stops the striking, -all substantiallyas described.

2. In a clock having hour and half-hoA st iking mechanism, thecombination of a in iutc-arbor, a twelve-tooth ratchet or step-whcontrolling the hour-striking work, loos mounted on said arbor so as tonormally mtate with it through friction, and having the carried bythehammer-shaft, means'for imj parting a reciprocating motion to saidlever,

means for imparting an up-and-down motion to the same, and a pinprojecting from said releasing-lever end and engagingwith the teeth ot'said ratchet-wheel, whereby the latter is given a retrograde motiontooth by tooth until the pin rests upon the said bridge and so stops thestriking, a cam'ilisk having two projections mounted on theminute-arbor, a .'feighted sleeve loosely iounted on the releasing-leverpin and havinga pin traveling on the surface ot said cam and engaging ateach halt-hour with the projections of the camdisk, and two projectionswhich receive between them the lower end of the releasing-lever, allsubstantially as described.

3. In a clock'haviug hour and half-hour strikingmechanism, thecombination of a ham` nier-shaft, means for operating the same, crankson said shaft, an arbor carried by said cranks, a releasing-bar having apin at its lower extremity mounted .at one end of said arbor, astop-lever mounted at the opposite end of said arbor, a pinion-shaft,means for rotating same once at each stroke, an arm pro jecting fromsaid pinionshaft and adapted to be engaged bythe stop of the stop-lever,a cam mounted on said pinion-shaft for raising said stop-lever, aminute-arbor` a twelve-tooth ratchet or step-wheel controlling thehourstriking work, loosely mounted on said arbor so as to normallyrotate with it through fric tion, and having the gapv between two teethbridged over, and provided with a lateral stop, an hour-wheel having astop which engages said stop of the ratchet-wheel and carries the latterwith it, a releasing-lever carried by the hainmer-shat`t, means forimparting a reciprocating motion to said lever, means for imparting anup-and-down motion to the same, and a pin projecting from said'releasing-lever. end and engaging with the teeth of said ratchetwheel,whereby the latter is given a retrograde motion tooth by tooth until thepin rests upon the said bridge and so stops the striking, a cam-diskhavlng two projections mounted on the minute-arbor, a weighted j sleeveloosely mounted on the releasing-lever pin and having a pin traveling onthe surface of said cam and engaging at each half-hour with theprojections of the cam-disk, and two j projections adapted to receivebetween them the lower end ot' the releasing-lever, all substantially asdescribed.

L1. Theeombination with the strikinffmech- .anism of a clock, a let-otlllever vibrating with the hammer and means controlled by the minutc-handarbor to actuate the let-ott lever and let ott the striking mechanism ateach revolution of the minute-hand arbor; of a step-wheel having twelveteeth and a stop adapted to move synchronously with the minutehandarbor, means t`o cause the step-wheel to move synchronously with thehour-hand before the striking of the hour and until the minutehand arborcompletes a revolution, and means on the let-oli' lever to turn thestep-.vheel in a direction opposite to the hands of the clockone-twelfth ofY a revolution for each hourstroke to bring-its stop inposition to stop the vibration of the let-ottl lever and lock thestriking mechanism, substantially as described.

5. The combination with the striking mechanism of a clock., a let-olillever vibrating with the hammer and means controlled by the movements ofthe minute-hand arbor to actuate the let-otf lever and release thestriking mechanism at each half-revolution of the min- 'cause saidwheelto move synchronously with the hour-hand before the striking of the hour-and until the minute-hand arbor has made a complete revolution, meanson the let-oil' lever to turn the step-wheel in a direction opposite tothe hands of the clock one-twelfth of a revolution for each stroke tobring its stop in position to istop the vibration of the let-off leverand lock the striking mechanism and means to prevent this backward movement of the step-wheel when the half-hour is struck, Substantially asset forth.

6. The combination with the striking mechanism of a clock, a let-otflever vibrating with the hammer and means controlled by the minute-handarbor to actuate the let-olf lever and let ofi' the striking mechanism;of a control- 7. The combination with the striking mechanism of a clock,a letoil' lever vibrating with the hammer and means controlled bytheininutc-hand arbor to actuate the let-off leverand let olln the strikingmechanism; of a controllingdevice revoluble with the minute-hand arbor,means to cause said device to move synchronously with the hour-handbefore the striking of the hour and before the minutehand arbor hascompleted a revolution, said let-ofi' lever adapted to imparta backwardanguiar movement to said controlling device for each hour-stroke, andsaid controlling device adapted to act on the let-oil' lever and causethe lat-ter to throw the striking mechanism out of operation when thehour has. been struck, and means preventing backward an gular movementof the controlling device when the half-hour is struck, substantially asset forth.

In testimony whereof I have signed my name to this specilication in thepresenceo two subscribing witnesses.

ROBERT TUERCK. Vitnesses:

O'rro i-zxxlxenn, A. Liennkxnoirr,

